DIGITAL MULTIMETER
Contents
1. key to change MAX MIN and HOLD mode 3 Switching the back light on When the meter is power on press key gt 2sec the back light will be turned on and the icon will display on the LCD Press the key once gt 2sec the light will be turned off and the icon will disappeared If you still need more operations please see the description of function keys M Function keys 1 ON OFF key Press the key to turn the power ON and press the key once more gt 2sec to turn the power OFF 2 Mode key Press the key can select the state of MAX MIN LCD will display the max min values since the instrument was last switched on or last reset 3 Unit key Press the key can change the parameter unit Adjustable units RH C td C RH F td F HOLD 4 HOLD key Press the key a 51 icon will display on the LCD and the readout held in Press the key once more to cancel the hold function Press the key gt 2sec the back light will be turned on and the t icon will display on the LCD Press the key once gt 2sec the light will be turned off and the icon will disappeared 5 Auto power off setting When the meter is powered on it is under auto power off mode The meter will power itself off after 20 minutes if no key operation Cancelled auto power off function press Hold key when power on until the LCD display AP OFF then press the Hold key again to confirm the setting B Maintenance 1 CLEA2. NING INSTRUCTIONS The meter may be wiped down with a wet sponge or cloth using a mild water based detergent or anti bacterial soap and rinsed under a gentle stream of cold water NOTE This unit is not designed for complete submersion or washing in water 2 BATTERY REPLACEMENT Use the following procedure When the battery voltage drop below proper operation range the E symbol will appear on the LCD display and the battery need to be replaced O Press the battery cover and towards arrowhead direction to open the battery cover 0 Replace the battery with three new 1 5V batteries U Replace the battery cover WLS2102
3. TEMPERATURE HUMIDITY DEW POINT METER ___Users Manual _ M Introduction Thank you for purchasing the temperature humidity dew point meter from us Please take a few minutes to browse through this user manual before you begin to operate the meter to ensure that you are fully familiarized with how best to operate the meter as accurately and safely as possible The meter is a temperature and humidity measuring instrument It is normally used to measure the humidity and temperature in offices storerooms buildings and greenhouses 1 1 Precautions safety measures To get the best service from this meter please read this user s manual carefully and observe the detailed safety precautions strictly 1 1 1 During use 1 Don t touch the humidity sensor 2 Don t expose the sensor to direct light this causes a false reading 3 Never store the product together with solvents acides or other aggressive substances 1 1 2 Maintaining the product Do not measure at a high temperature places When not using the instrument for a long time please remove the battery and avoid storing in high temperature and high humidity M Features 1 Display 4 digits LCD Display 2 Parameters C F RH relative humidity td dew point temperature 3 Resolution 0 1 C 0 1 F 0 1 RH 4 Range 10 50 C 14 122F 0 100 RH 5 Accuracy 1 0 1 8 F 3 RH 5 95 RH 6 Sample rate 1 time sec 7 auto power off about 20
4. minutes 8 Operating environment 10 50 C 14 122 F 9 Storage environment 20 60 C 4 140 F 10 Dimension and Weight 121 L x60 W x30 H mm about 180g 11 Accessories DC1 5V AAA x 3pcs String 1pcs Users manual 1pcs E Names of parts Instrument Familiarization 1 Sensor cover 3 2 Sensor if l 3 LCD display 4 Function key Temperature Humidity depot wor LCD Display inc The meaning of the symbols represented by the following 1 Indicating it is now in the data holding state Indication to back light Display zone Display zone Maximum Minimize Humidity units Temperature units N O R I Indication to low voltage of the batteries Bl Operation Instruction In order to ensure the accuracy of the measurement readings all the interference sources which may affect the measurement results about temperature and humidity such as the hand must be away from the sensor 1 Put the instrument with enough battery power in the hand press the ON OFF key to turn the power on and enter into the measuring mode The LCD will display the current value of temperature and humidity The default humidity temperature unit is RH 2 Press Unit key to change the humidity temperature unit The adjustable parameters are RH relative humidity td Dew point temperature F press the Mode and
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